Construction method of foundation structure comprising cross bar

ABSTRACT

The present disclosure relates to a construction method of a foundation structure for constructing the foundation structure by installing support piles and a foundation slab connected to the top of the support piles, and more particularly, to a construction method of a foundation structure including a cross bar, including: a support pile installing step in which a plurality of support piles are driven in the ground, each support pile includes three coupling bands (referred to as a first coupling band, a second coupling band, and a third coupling band from the top to the bottom) that are coupled to the top to be spaced apart from each other at predetermined intervals, a first cross bar coupling with a reinforcing bar of the foundation slab is coupled to the second coupling band, and a second cross bar coupled with the first coupling band of the neighboring support pile is coupled to the third coupling band; a reinforcing bar placing step of placing a reinforcing bar for the foundation slab on the top of the plurality of support piles; and a support pile reinforcing step of reinforcing the top of the plurality of support piles by coupling the reinforcing bar of the foundation slab with the first cross bar and coupling the first coupling band with the second cross bar.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority from Korean Patent Application No. 10-2016-0159200, filed on Nov. 28, 2016, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

The present disclosure relates to a construction method of a foundation structure including support piles and a foundation slab.

BACKGROUND

Foundation construction as a base of a structure refers to an operation of constructing a structure for transferring both a vertical load by a self-weight of the structure when the structure such as a building, a bridge, or a dam is constructed on the ground and a horizontal load when earthquake, wind, and so on are applied to the structure, to the ground.

The detailed description is as follows. The foundation structure by the foundation construction is mainly consisted of support piles driven in the ground and a foundation slab on the top of support piles. The support pile is lightly driven after the ground is bored by using boring machine such as an auger screw, the cement milk is injected into a bore hole, and then the support pile is inserted. Thereafter, the cement milk may be additionally filled to firmly bind the support piles to the ground.

After the support piles are driven in the ground, reinforcing bars for connecting foundation slab are placed on the top of the support piles. When the placing of reinforced bar is finished, the foundation slab is completed by pouring the foundation concrete.

The support piles and the foundation slab constructed above transmit these loads to the ground while supporting both vertical and horizontal loads.

The inventors of the present disclosure have studied the construction method for increasing the bearing capacity against the vertical load and the horizontal load of the foundation structure for a long time, and after trial and error, completed the present disclosure.

SUMMARY

Technical objects of the present disclosure are clear. The present disclosure has been made in an effort to provide a construction method of a foundation structure capable of improving horizontal and vertical bearing capacities of the top of support piles supporting a foundation slab.

And, the present disclosure has been made in an effort to increase the bearing capacity through the installation of cross bars between support piles and the additional connection of the support piles and a foundation slab.

Further, the present disclosure has been made in an effort to provide a construction method of a foundation structure capable of facilitating the installation of cross bars between support piles and the connection of the cross bars between the support piles and a foundation slab.

Meanwhile, other objects of the present disclosure which are not mentioned above will be further considered within the scope easily deduced from the following detailed description and the effects thereof.

An exemplary embodiment of the present invention provides a construction method of a foundation structure including a cross bar as a construction method of a foundation structure for constructing the foundation structure by installing support piles and a foundation slab connected to the top of the support piles, the construction method including: a support pile installing step in which a plurality of support piles are driven in the ground, each support pile includes three coupling bands (referred to as a first coupling band, a second coupling band, and a third coupling band from the top to the bottom) that are coupled to the top to be spaced apart from each other at predetermined intervals, a first cross bar coupling with a reinforcing bar of the foundation slab is coupled to the second coupling band, and a second cross bar coupled with the first coupling band of the neighboring support pile is coupled to the third coupling band; reinforcing bar assembling step of assembling a reinforcing bar for the foundation slab on the top of the plurality of support piles; and a support pile reinforcing step of reinforcing the top of the plurality of support piles by coupling the reinforcing bar of the foundation slab with the first cross bar and coupling the first coupling band with the second cross bar.

The first cross bar and the second cross bar may be hinged to the second coupling band and the third coupling band, respectively.

The support pile may include any one of a PHC pile, a steel pipe pile, and an H-shaped pile.

The first cross bar and the second cross bar may include any one of a steel wire, a steel bar, a steel pipe, a carbon fiber pipe, and a carbon fiber bar.

Each of the three coupling bands may be formed in a clamp type and coupled to the support pile by bolting.

According to the construction method of the foundation structure in accordance with the exemplary embodiment of the present disclosure, it is possible to improve horizontal and vertical bearing capacities at the top of support piles.

Due to the increase of the bearing capacity, anti-seismic capacity is increased and it is possible to widen the installation interval between the support piles, thereby helping to reduce the number of support piles.

Further, it is possible to facilitate the connection of the cross bars between the support piles and connection of the cross bars between the support piles and the foundation slab.

On the other hand, even if not explicitly mentioned here, it is understood that effects described in the following specification which are expected by the technical features of the present disclosure and the provisional effects are considered as those described in the specification of the present disclosure.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating a foundation structure to be built by a construction method of the foundation structure including a cross bar in accordance with an exemplary embodiment of the present disclosure.

FIG. 2 is a diagram illustrating a process of the construction method of the foundation structure including the cross bar in accordance with the exemplary embodiment of the present disclosure.

FIG. 3 is a diagram illustrating that support piles having a first cross bar and a second cross bar are driven in the ground.

FIG. 4 is a diagram illustrating that a reinforcing bar for a foundation slab is placed on the top of the driven support piles.

FIG. 5 is a diagram illustrating that the first cross bar coupled to the support piles is coupled to the reinforcing bar.

FIG. 6 is a diagram illustrating that the coupling band of the support pile and the cross bar is hinged to each other.

FIG. 7 is a diagram illustrating a clamp type as an example of the coupling band.

It is understood that the accompanying drawings illustrate exemplary embodiments of the technical idea of the present disclosure and the scope of the present disclosure is not limited thereto.

DETAILED DESCRIPTION

In the following detailed description, reference is made to the accompanying drawing, which forms a part hereof. The illustrative embodiments described in the detailed description, drawing, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the technical idea or scope of the subject matter presented here.

Terms such as first, second, and so on may be used to describe various components and the components should not be limited by the terms. The terms are used only to discriminate one constituent element from another component.

Terms used in the present application are used only to describe specific embodiments, and are not intended to limit the present invention. A singular form may include a plural form if there is no clearly opposite meaning in the context. In the present application, it should be understood that term “include” or “have” indicates that a feature, a number, a step, an operation, a component, a part or the combination thereof described in the specification is present, but does not exclude a possibility of presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof, in advance.

Hereinafter, an exemplary embodiment of a construction method of a foundation structure including a cross bar according to the present disclosure will be described in detail with reference to the accompanying drawings. When describing with reference to the accompanying drawings, like or corresponding components designate like reference numerals and the duplicated description thereof will be omitted.

FIG. 1 is a diagram illustrating a foundation structure to be built by a construction method of the foundation structure including a cross bar in accordance with an exemplary embodiment of the present disclosure. As illustrated in FIG. 1, a foundation structure to be built by a construction method of a foundation structure including a cross bar in accordance with the present invention includes a foundation slab S, a plurality of support piles 100 for supporting the foundation slab S, and a plurality of cross bars for connecting the support piles 100.

Through such a structure, bearing capacity against horizontal and vertical loads of the support piles 100 may be improved. Through the increase of the bearing capacity against the horizontal and vertical loads, anti-seismic capacity is increased and construction gaps between the support piles 100 may be increased, thereby contributing to the reduction of the number of the support piles 100 and being very economically advantageous.

Hereinafter, the construction method of the foundation structure will be described in detail. FIG. 2 is a diagram illustrating a process of the construction method of the foundation structure including the cross bar according to the exemplary embodiment of the present disclosure. As illustrated in FIG. 2, the construction method of the foundation structure including the cross bar according to the present disclosure includes a support pile installing step, a reinforcing bar 400 placing step, a support pile 100 reinforcing step, and a concrete depositing step.

In the support pile installing step, the plurality of support piles 100 are driven in the ground and the respective support piles 100 are spaced apart from each other at predetermined intervals. Three coupling bands are coupled to each of the support piles 100. The support pile 100 may be any one of a PHC pile, a steel pipe pile, and an H-shaped pile. In addition, various support piles 100 may correspond to the scope of the present disclosure.

FIG. 3 is a diagram illustrating that the support piles 100 having a first cross bar 200 and a second cross bar 300 are driven in the ground.

As illustrated in FIG. 3, three coupling bands are coupled to the top of each support pile 100 so as to be spaced apart from each other by a predetermined interval. Here, for convenience of description, the three coupling bands are referred to as a first coupling band 110, a second coupling band 120, and a third coupling band 130 from top to bottom, respectively.

FIG. 7 is a diagram illustrating a clamp type as an example of the coupling band. In FIG. 7, a double-bolt B type fixing clamp K is illustrated, but the scope of the present disclosure is not limited thereto. Various clamps, such as an automatic clamp, a differential clamp, an orthogonal clamp, a single clamp, an orthogonal automatic clamp, and a steel beam clamp, may be applied.

The clamp K may be easily coupled to the support pile 100, and in some cases, a coupling location may be easily changed. That is, a bolt B of the clamp K may be simply released and positioned, and then the bolt B may be tightened again and positioned.

The second and third coupling bands from the top among the three coupling bands, that is, the second coupling band 120 and the third coupling band 130 are coupled to the cross bars, respectively. The first cross bar 200 is coupled to the second coupling band 120. The first cross bar 200 connects the second coupling band 120 and the foundation slab S with each other. More accurately, the first cross bar 200 connects the second coupling band 120 and the placed reinforcing bar 400 of the foundation slab S with each other. The configuration of the first cross bar 200 eventually connects the support piles 100 and the foundation slab S with each other.

The second cross bar 300 is coupled to the third coupling band 130. The second cross bar 300 connects the third coupling band 130 and the first coupling band 110 of the neighboring support pile 100. The neighboring two support piles 100 may be connected to each other through the configuration of the second cross bar 300.

As illustrated in FIG. 3, the second cross bar 300 is relatively longer than the first cross bar 200. This is because the first cross bar 200 is connected to the upper reinforcing bar 400 and the second cross bar 300 is coupled to the neighboring support pile 100.

At this time, the first cross bar 200 and the second cross bar 300 may be hinged to the coupling bands of the support piles 100. FIG. 6 is a diagram illustrating that the coupling bands of the support piles 100 and the cross bars are hinged to each other.

The first cross bar 200 is hinged to the second coupling band 120 and the second cross bar 300 is hinged to the third coupling band 130. When the support piles 100 are driven in the ground, the first cross bar 200 hinged to the second coupling band 120 and the second cross bar 300 hinged to the third coupling band 130 are folded toward the support piles 100 and then the support piles 100 are driven in the ground, and thereafter, when each cross bar is coupled to the foundation slab S or the first coupling band 110 of the neighboring support pile 100, the folded cross bar is unfolded and connected.

In particular, since the second cross bar 300 is connected from the third coupling band 130 of one support pile 100 to the first coupling band 110 of the other support pile 100, that is, diagonally connected, the length of the second cross bar 300 needs to be longer than the distance between the two support piles 100. Therefore, the support pile 100 is driven in the ground with the second cross bar 300 folded, and then the second cross bar 300 is unfolded to connect the support piles 100 together.

The first cross bar 200 may freely adjust the coupling position of the reinforcing bar 400 when the first cross bar 200 is hinged to the reinforcing bar 400 of the foundation slab S.

The first cross bar 200 and the second cross bar 300 may be formed of a high strength steel wire, a high strength steel bar, a high strength steel pipe, a high strength carbon fiber pipe, or a high strength carbon fiber bar. Such a steel wire or steel bar needs to be made of a material having sufficiently high strength to withstand the vertical load of the upper foundation slab S and the horizontal load due to wind, earthquake, etc., and to transmit the loads to the support pile 100.

FIG. 4 is a diagram illustrating that the reinforcing bar 400 for the foundation slab S is placed on the support piles 100. Each support pile 100 to which the first cross bar 200 and the second cross bar 300 are coupled is driven in the ground and then the reinforcing bar 400 for the foundation slab S is placed on the support piles 100. A plurality of reinforcing bars 400 may be arranged in a plurality of rows at regular intervals and may be cross-arranged and layer-arranged. The placement of the reinforcing bars 400 may be adjusted according to various field conditions. At this time, the cross bar may be adjusted not to interfere with the placement of the reinforcing bars 400 by the hinge rotation of the coupling bands and the cross bars.

FIG. 5 is a diagram illustrating that the first cross bar 200 coupled to the support pile 100 is coupled to the reinforcing bar 400. As illustrated in FIG. 5, the first cross bar 200 is coupled with the reinforcing bar 400, and a fastener for coupling the first cross bar 200 to the reinforcing bar 400 may be installed. The fastener may be arranged at one reinforcing bar 400 or two reinforcing bars 400 disposed in parallel as illustrated in FIG. 5.

The reinforcing bars 400 are placed, a fastener is installed to the placed reinforcing bars 400, and thereafter, the first cross bar 200 may be coupled to the fastener to connect the support piles 100 and the reinforcing bars 400 to each other. The coupling of the first cross bar 200 and the reinforcing bars 400 may be performed by various fastening methods. The first cross bar 200 and the reinforcing bars 400 may be coupled to each other by welding or a fastening wire.

A method of coupling the second cross bar 300 to the first coupling band 110 may be performed by the aforementioned various fastening methods.

After the support pile 100 reinforcing step of reinforcing the support pile 100 through the coupling of the first cross bar 200 and the reinforcing bars 400 and the coupling process of the second cross bar 300 and the first coupling band 110, pouring concrete step of pouring a foundation concrete C on the foundation slab S may be performed. The poured foundation concrete C may further strength the coupling of the first cross bar and the reinforcing bars 400.

In this way, the support piles 100 are driven in the ground, the reinforcing bars 400 are placed on the top of the driven support piles 100, and the placed reinforced bars 400 and the first cross bar 200 are coupled to each other and the second cross bar 300 and the first coupling band 110 are coupled to each other, and then the foundation concrete C is poured to complete the foundation slab S.

From the foregoing, it will be appreciated that various embodiments of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and technical idea of the present disclosure. Accordingly, the various embodiments disclosed herein are not intended to be limiting, with the true scope and technical idea being indicated by the following claims. 

What is claimed is:
 1. A construction method of a foundation structure including a cross bar by installing support piles and a foundation slab connected to the top of the support piles, the construction method comprising: a support pile installing step in which a plurality of support piles are driven in the ground to be spaced apart from each other at predetermined intervals, each support pile includes three coupling bands (referred to as a first coupling band, a second coupling band, and a third coupling band from the top to the bottom) that are coupled to be spaced apart from each other at predetermined intervals, and includes a first cross bar of which one end is hinged to the second coupling band and the other end is coupled to a reinforcing bar of the foundation slab and a second cross bar of which one end is hinged to the third coupling band and the other end is coupled with the first coupling band of the neighboring support pile, in which the first cross bar hinged to the second coupling band and the second cross bar hinged to the third coupling band are driven in the ground in a folded state toward the support pile; a reinforcing bar placing step of placing a reinforcing bar for the foundation slab on the top of the plurality of support piles to be adjusted to prevent the first cross bar and the second cross bar from interfering with the placement of the reinforcing bar by a hinge rotation; and a support pile reinforcing step of reinforcing the top of the plurality of support piles by coupling the reinforcing bar of the foundation slab with the other end of the first cross bar which moves to the reinforcing bar of the foundation slab by hinge rotation and coupling the other end of the second cross bar with the first coupling band of the neighboring support pile by the hinge rotation.
 2. The construction method of claim 1, wherein the support pile includes any one of a PHC pile, a steel pipe pile, and an H-shaped pile.
 3. The construction method of claim 1, wherein the first cross bar and the second cross bar include any one of a steel wire, a steel bar, a steel pipe, a carbon fiber pipe, and a carbon fiber bar.
 4. The construction method of claim 1, wherein each of the three coupling bands is formed in a clamp type and is coupled to the support pile by bolting. 